skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: UEDGE and DEGAS modeling of the DIII-D scrape-off layer plasma

Abstract

This paper presents the results of work to develop benchmarked theoretical models of scrape-off-layer (SOL) characteristics in diverted tokamaks by comparing shot simulations using the UEDGE plasma fluid and DEGAS Monte-Carlo neutral particle transport codes to measurements of the DIII-D SOL plasma. The available experimental data include the radial profiles of electron density and temperature, the ion temperature, the divertor exhaust power, the intensity of H{sub {alpha}} emission, and profiles of the radiated power. A very simple model of the anomalous perpendicular transport rates produces consistency between the calculated and measured radial profiles of the divertor power, and of the midplane densities and temperatures. Experimentally, measured exhaust power is now typically 80--90% of the input power. The simulated peak power on the outer leg of the divertor floor is now within about 20% of the measured power. Various sensitivities of the simulation and measurement comparisons to model assumptions are described. Finally, these benchmarked models have been used to examine the effects of various baffle configurations for the Radiative Divertor Upgrade in DIII-D.

Authors:
; ; ; ; ; ;  [1]; ;  [2]
  1. Lawrence Livermore National Lab., CA (United States)
  2. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (United States); General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10196607
Report Number(s):
UCRL-JC-115491; CONF-940580-23
ON: DE95003652; 35AT10020/35AT15040
DOE Contract Number:  
W-7405-ENG-48; AC03-89ER51114
Resource Type:
Conference
Resource Relation:
Conference: 11. international conference on plasma surface interactions in controlled fusion devices,Mito (Japan),23-27 May 1994; Other Information: PBD: May 1994
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PLASMA SCRAPE-OFF LAYER; U CODES; D CODES; DOUBLET-3 DEVICE; MONTE CARLO METHOD; DIVERTORS; PLASMA SIMULATION; H-MODE PLASMA CONFINEMENT; 700420; 700330; PLASMA-FACING COMPONENTS; PLASMA KINETICS, TRANSPORT, AND IMPURITIES

Citation Formats

Genstermacher, M E, Porter, G D, Rensink, M E, Rognlien, T D, Allen, S L, Hill, D N, Lasnier, C J, Leonard, T, and Petrie, T. UEDGE and DEGAS modeling of the DIII-D scrape-off layer plasma. United States: N. p., 1994. Web.
Genstermacher, M E, Porter, G D, Rensink, M E, Rognlien, T D, Allen, S L, Hill, D N, Lasnier, C J, Leonard, T, & Petrie, T. UEDGE and DEGAS modeling of the DIII-D scrape-off layer plasma. United States.
Genstermacher, M E, Porter, G D, Rensink, M E, Rognlien, T D, Allen, S L, Hill, D N, Lasnier, C J, Leonard, T, and Petrie, T. Sun . "UEDGE and DEGAS modeling of the DIII-D scrape-off layer plasma". United States. https://www.osti.gov/servlets/purl/10196607.
@article{osti_10196607,
title = {UEDGE and DEGAS modeling of the DIII-D scrape-off layer plasma},
author = {Genstermacher, M E and Porter, G D and Rensink, M E and Rognlien, T D and Allen, S L and Hill, D N and Lasnier, C J and Leonard, T and Petrie, T},
abstractNote = {This paper presents the results of work to develop benchmarked theoretical models of scrape-off-layer (SOL) characteristics in diverted tokamaks by comparing shot simulations using the UEDGE plasma fluid and DEGAS Monte-Carlo neutral particle transport codes to measurements of the DIII-D SOL plasma. The available experimental data include the radial profiles of electron density and temperature, the ion temperature, the divertor exhaust power, the intensity of H{sub {alpha}} emission, and profiles of the radiated power. A very simple model of the anomalous perpendicular transport rates produces consistency between the calculated and measured radial profiles of the divertor power, and of the midplane densities and temperatures. Experimentally, measured exhaust power is now typically 80--90% of the input power. The simulated peak power on the outer leg of the divertor floor is now within about 20% of the measured power. Various sensitivities of the simulation and measurement comparisons to model assumptions are described. Finally, these benchmarked models have been used to examine the effects of various baffle configurations for the Radiative Divertor Upgrade in DIII-D.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {5}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: